blk-mq: Delete blk_mq_has_free_tags() and blk_mq_can_queue()

These functions are not referenced, so delete them.
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

block/blk-mq-tag.c

@@ -15,14 +15,6 @@
 #include "blk-mq.h"
 #include "blk-mq-tag.h"
 
-bool blk_mq_has_free_tags(struct blk_mq_tags *tags)
-{
-	if (!tags)
-		return true;
-
-	return sbitmap_any_bit_clear(&tags->bitmap_tags.sb);
-}
-
 /*
  * If a previously inactive queue goes active, bump the active user count.
  * We need to do this before try to allocate driver tag, then even if fail

block/blk-mq-tag.h

@@ -28,7 +28,6 @@ extern void blk_mq_free_tags(struct blk_mq_tags *tags);
 extern unsigned int blk_mq_get_tag(struct blk_mq_alloc_data *data);
 extern void blk_mq_put_tag(struct blk_mq_hw_ctx *hctx, struct blk_mq_tags *tags,
 			   struct blk_mq_ctx *ctx, unsigned int tag);
-extern bool blk_mq_has_free_tags(struct blk_mq_tags *tags);
 extern int blk_mq_tag_update_depth(struct blk_mq_hw_ctx *hctx,
 					struct blk_mq_tags **tags,
 					unsigned int depth, bool can_grow);

block/blk-mq.c

@@ -260,12 +260,6 @@ void blk_mq_wake_waiters(struct request_queue *q)
 			blk_mq_tag_wakeup_all(hctx->tags, true);
 }
 
-bool blk_mq_can_queue(struct blk_mq_hw_ctx *hctx)
-{
-	return blk_mq_has_free_tags(hctx->tags);
-}
-EXPORT_SYMBOL(blk_mq_can_queue);
-
 /*
  * Only need start/end time stamping if we have iostat or
  * blk stats enabled, or using an IO scheduler.

include/linux/blk-mq.h

@@ -424,7 +424,6 @@ void blk_mq_free_tag_set(struct blk_mq_tag_set *set);
 void blk_mq_flush_plug_list(struct blk_plug *plug, bool from_schedule);
 
 void blk_mq_free_request(struct request *rq);
-bool blk_mq_can_queue(struct blk_mq_hw_ctx *);
 
 bool blk_mq_queue_inflight(struct request_queue *q);